The two stars squared up to one another at a celebrity-filled event at Cipriani restaurant, and in video footage of the confrontation, obtained by TMZ.com, the pair appear to engage in a shoving match, before Bloom allegedly attempts to throw a punch at Bieber, only to miss his target.

Reports suggest the altercation was over Bloom’s ex, Australian supermodel Kerr, who Bieber allegedly flirted with while performing at the 2012 Victoria’s Secret Fashion Show, and Bieber seemed eager to goad Bloom hours after the pair came face to face by uploading a sexy shot of the bikini-clad beauty on his Instagram.com account.

The image was promptly deleted and the 20 year old subsequently tweeted, “Keeping it positive,” but then hours later, he posted a photo of Bloom appearing to cry.